I thought that the capacity of the stadium was actually 5,700 (Capacity of the original stand is 3,048 not 3,300 or 3,500) take away the 200 or so seats (which seemed a it ott) left for segregation and you have 5,500 not 6,100.
I presume they don't sell tickets to stand behind the goal?
That being said they probably could have sold 8,000+ tickets.