400NL : fold AA on scary board, very loose aggressive

[cbloom]

Very loose aggressive 400 NL (6 max) table. People open raise with any two, always continuation-bet, and frequent re-raise bluffs and resteals.

I get AA in early position and figure I'll win huge with all this action. I make the standard raise to $15. CO calls as do both blinds. Unusual to have so many callers at this table, usually only one.

Pot $60
Flop 7c8h9h

SB checks, BB bets $40
I raise to $140
SB raises allin (about $400 total)
BB folds
I think a long time and fold

I'm thinking maybe this should have been a call, particularly because of the table character with so much aggression and bluffing. On the other hand, there's a bet and big raise on the flop and this guy still pushes, so he must have a set, straight or at least two pair? If I call I'm hoping to see a flush draw.