thanks guys, when calling the 3bet i was ready to fold unless i hit the flop, but the pot just seemed too bloated to let go off so easy. thanks for assuring me off the correct decision.

Flop: (X SB) 9, 9, 6 (3 players)
BB checks, Hero checks, MP3 bets, BB calls, Hero calls.

to make it interesting, what number would you say X would have to be to make that flop call?