do i bet here

[aaaaaaaa]

PokerStars Game #10596726425: Tournament #52919616, $200+$15 Hold'em No Limit - Level II (50/100) - 2007/06/24 - 13:11:12 (ET)
Table '52919616 107' 9-max Seat #6 is the button
Seat 1: fit2survive (14700 in chips)
Seat 2: chad22 (13050 in chips)
Seat 3: aaaaaaaa (7650 in chips)
Seat 4: popi1718 (8325 in chips)
Seat 5: vulty (8450 in chips)
Seat 6: apierce (8725 in chips)
Seat 7: CRUSH701 (2275 in chips)
Seat 8: Ruupa (13175 in chips)
Seat 9: dal_elama (13575 in chips)
CRUSH701: posts small blind 50
Ruupa: posts big blind 100
*** HOLE CARDS ***
Dealt to aaaaaaaa [Qh Ac]
dal_elama: folds
fit2survive: folds
chad22: raises 300 to 400
aaaaaaaa: raises 300 to 700
popi1718: folds
vulty: folds
apierce: folds
CRUSH701: folds
Ruupa: calls 600
chad22: calls 300
*** FLOP *** [Ts 5d Kc]
Ruupa: checks
chad22: checks
aaaaaaaa: checks
*** TURN *** [Ts 5d Kc] [3d]
Ruupa: checks
chad22: checks
aaaaaaaa:?????????????? SHOULD I BET HERE OR JUST CHECK ?

THE GUY WHO COLDCALLED SEEMED PRETTY LOOSE