Suppose that due to an unknown serious environmental changes, zoologists have detected a gender imbalance in the population of trumpeter swans. Instead of a 50-50 gender balance at birth, they find that approximately 110 females are born for every 100 males. Assuming that trumpeter swans tend to mate for life and that there are approximately 800,000 in the population, calculate the female surplus of trumpeter swans that would exist as a result of this imbalance.