We use "number + hundred" for numbers between 1000 and 2000. Something can be described as "thirteen hundred pounds" or "sixteen hundred and fifty pounds" etc.
I agree, but at least in AmE we do this up to 10,000, although not with the even thousand intervals, and typically only on exact hundred intervals. If it's money, you'll often hear the 1,000 dollar increments as 'number + grand'.
3,500 = thirty-five hundred
7,600 = seventy six hundred
3,000 = three grand (money), three thousand (other units)