I'd say your right on the money mate.
3600lbs - 3700lbs (1,650kg's)
The easiest way to know for sure is to have the car cleaned, remove anything that wouldn't usually be in there ina daily driver circumstance (eg: takeaways, grocerys, gym stuff, work related objects etc) and go to your local tip, dump or rubbish refuse and have it weighed on there scales. If your local doesn't have one go to your nearest truck stop.