The river made me retreat...

What do you do on the turn here? (ie how much you bet)

PokerStars No-Limit Hold'em Tourney, Big Blind is t20 (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

CO (t1360)
Button (t1470)
SB (t1440)
BB (t1470)
UTG (t1510)
Hero (t1640)
MP1 (t1130)
MP2 (t1460)
MP3 (t2020)

Preflop: Hero is UTG+1 with K, K.
1 fold, Hero raises to t80, 2 folds, MP3 calls t80, 2 folds, SB calls t70, 1 fold.

Flop: (t260) 4, Q, 7 (3 players)
SB checks, Hero bets t250, MP3 folds, SB calls t250.

Turn: (t760) 2 (2 players)
SB checks, Hero bets t500, SB calls t500.

River: (t1760) Q (2 players)
SB bets t610 (All-In), Hero folds.

Final Pot: t2370

Results in white below:
SB doesn't show.
Outcome: SB wins t2370.

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I bet pot on the flop.

Im all in on the turn.

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