[Closed] $11 Aj

I]Hand converted with online PokerStrategy.com hand converter:

Play hand

$40/$80 No-Limit Hold'em (7 handed)

Known players:
[tg]MP3$1320.00:///////;CO$915.00:///////;BU (Hero)$1290.00:///////;SB$1900.00:///////;BB$2520.00:///////;MP1$2375.00:///////;MP2$3180.00:///////;[/tg]

Preflop: Hero is BU with A:c, J:s.
3 folds, CO calls $80.00, Hero raises to $280.00, 2 folds, CO calls $200.00.

Flop: ($680) 3:h, 7:d, 4:c (2 players)
CO bets $80.00, Hero calls $80.00.

Turn: ($840) 8:h (2 players)
CO bets $80.00, Hero calls $80.00.

River: ($1000) 9:s (2 players)
CO raises to $475.00(All-In), Hero folds, CO gets uncalled bet back.

Final Pot: $1000.

opponent was a fish
should I just push on the flop