One of my hand, social media freeroll

I have AJs in utg, open 200, blinds 50/100 my stack about 33bb, fold to agro player kn BU, he 3betto 750, sb and bb folds. What is your play?

Need more info. What's his stack? near the bubble? what type of aggro? Is he a whale aggro, or actually a solid aggro? Depending on this info I am either 4betting or folding. I'm never flatting here as I don't want to play OOP vs an aggro player with only 33bigs and no room to maneuver . You will have to fold flop way to often when you miss being only 27ish bb effective.