Yes I  did

Has called twice and left no message.

Called at 7:40pm Sunday evening.
I answered the phone intending to just hang up since  100% of all calls I have ever received with the caller ID being the form "V000000000000000" have all been scam calls. Then I block the number.

Before I could hang up some man said Hello, then without me answering he said some about being so-n-so with something like some "firefighters" association....
I assume they were going to ask for a "donation".

First, almost all calls I've gotten like this (firefighter,police,etc) have been from scammers. So I never donate anything.
Second, I don't trust anyone calling and asking for money any longer, no matter what. 99% of all such calls are scammers after all and that means you cannot determine if you happen to be talking to the 1% that is truly what they claim.

So I would suggest if you do let them talk and you are considering donating, ASK them for their full organization name, location, contact address and phone number(s). Then research them online. Check with the state and the IRS. All legit organizations must be registered with both the state and the IRS. If they aren't, they're not legit as an "organization".
Do your homework, then donate if you find all is good. BUT, if they say they will have someone show up to get the donation - STOP. No legit group does that - scammers DO!

Caler identfied themslves as work for the firefighters guildI told him that I was watching football and to send me something in the mail, and I hung up

They just kept saying 105. It makes me mad they call so late!