Overpair on non scary flop

5-handed
Level: 100/200. Blinds will increase to 150/300 within 1 minute.

Live tournament.

UTG (Hero) 2900
UTG +1 3200
Button 3100
SB 3500
BB 6300

I get dealt 9 [img]/images/graemlins/spade.gif[/img] 9 [img]/images/graemlins/diamond.gif[/img]. I flat call and sb completes. BB raise bbx3. Both me and button calls. Pot is now 1500.

Flop comes down 3-3-7 rainbow. SB bets out 500 and BB calls. Whats my move here?

I am thinking a push here would be ok to get it all down. My read on both is that SB likes to play suited cards, no matter the gap between them and Ax. Same with BB but a little bit more tight and he raise with Ax if no raiser is in front of him.

Only top 2 pays.