Suppose a species of bird called the red‑crested warbler has a plumage length that is controlled by a single gene. The Plm allele produces long plumage and is dominant over the plm short plumage allele. One population exists in North America (Na) and a separate population exists in South America (SA). The trait is in Hardy-Weinberg equilibrium in each population.

An island nature preserve brings in 112 NA warblers and 452 SA warblers.
452 SA warblers. Out of the 112 NA birds, 55 have long plumage. Out of the 452 SA warblers, 75 have long plumage. After the birds from the combined populations mate randomly, the island population produces 1000 offspring. Calculate the number of these offspring that are expected to have long plumage. Round the number to two significant figures.