PokerStars No-Limit Hold'em, 20.8 Tournament, 200/400 Blinds 40 Ante (6 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

Im new to DONs as Full Tilt doesnt have them. Also read Nakamuras guide which was really helpful. Well so far so good cashed every time but once I think.

But this came up. Any suggestions?

MP (t2175)
CO (t2715)
Button (t3110)
SB (t3415)
BB (t1375)
Hero (UTG) (t2210)

Hero's M: 2.63

Preflop: Hero is UTG with J, A
5 folds

Total pot: t640

Was this a shove?

As shown I did fold and made the money but comments welcome as this seemed a tough spot..