The UTG+1 player has been tight , so I elected to flat his raise pre . But on the flop is this the right move to go with my stacks or not ? If he shoves , I can fold . Is the size of 3 bet ok .

Full Tilt Poker Game #23511931196: $19,500 Guarantee (181569186), Table 47 - 150/300 Ante 25 - No Limit Hold'em - 14:13:03 ET - 2010/08/31
Seat 1: Adscads (8,916)
Seat 2: DcHustler (5,910)
Seat 3: Azuth (6,916)
Seat 4: ik kraak je (11,071)
Seat 5: doctor tilt (29,004)
Seat 6: Zsipali (6,250)
Seat 7: azpatience (8,497)
Seat 8: WODKA COLA75 (15,572)
Seat 9: mateo55 (4,585)
Adscads antes 25
DcHustler antes 25
Azuth antes 25
ik kraak je antes 25
doctor tilt antes 25
Zsipali antes 25
azpatience antes 25
WODKA COLA75 antes 25
mateo55 antes 25
WODKA COLA75 posts the small blind of 150
mateo55 posts the big blind of 300
The button is in seat #7
*** HOLE CARDS ***
Dealt to azpatience [Ac Ks]
Adscads folds
DcHustler raises to 650
Azuth folds
ik kraak je folds
doctor tilt folds
Zsipali folds
azpatience calls 650
WODKA COLA75 calls 500
mateo55 folds
*** FLOP *** [2s 9d Jh]
WODKA COLA75 checks
DcHustler has 15 seconds left to act
DcHustler bets 975
azpatience has 15 seconds left to act
azpatience raises to 2,400
WODKA COLA75 has 15 seconds left to act
WODKA COLA75 folds
DcHustler has 15 seconds left to act