PokerStars No-Limit Hold'em, $20 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Hero ($5242)
BB ($3193)
UTG ($1042)
MP ($2863)
ElkY ($13887)
Button ($1990)

Preflop: Hero is SB with J, J.
UTG raises to $60, 1 fold, ElkY calls $60, 1 fold, Hero raises to $260, 1 fold, UTG folds, ElkY calls $200.

Flop: ($610) 9, A, A (2 players)
Hero bets $500, ElkY raises to $1300, Hero calls $800.

Turn: ($3210) 7 (2 players)
Hero checks, ElkY checks.

River: ($3210) 4 (2 players)
Hero checks, ElkY bets $1400


How would you play this hand? I have called down ElkY on a $800 river bet a couple of hours ago, that time he had two pair. I'm pretty sure he doesn't have an ace here, don't think he'd play it like this, what do you think? But still, raising the flop here is expensive and I risk loosing 5k if I'm wrong. On river he might have hit a flush or FH though, and he also probably knows I'm not too keen on playing a huge pot oop with a marginal hand.