AA vs donk bet on a 974 board. Fold?

5/5

~$1100 effective

SB - 30 y o, regish type of player. Plays tight and reasonable, haven’t seen him do anything stupid.

UTG opens to $20, CO calls, Hero(BU) A♦A♠ 3bets to $100, SB calls, UTG calls, CO folds

Flop($325) 9♦ 7♣ 4♦

SB donks $300, UTG folds, Hero($1000 left) - ?

I’m blocking possible draws, and I still beat hands like QQ or JJ, but how often are people playing those hands this way?