Don't get too excited. Leg presses are very deceiving, especially cable versions. They are popular with bodybuilders because they can load it to the hilt and rep out with them. I have personally leg pressed over 1000 pounds for 6 reps, but I can tell you that my I could never squat anywhere near that. I have seen bodybuilders rep out with 1600 lb whould couldn't even squat 225 with good form. If I were to even try to support 1000 pounds on a bar it would squash me into the ground!
Want to get a good idea of how strong your legs are? Try doing some squats.