CREATE TABLE table_78569 ("Official Name" TEXT, "Status" TEXT, "Area km 2" FLOAT, "Population" FLOAT, "Census Ranking" TEXT)

Which parish has an area of 750.51?
SELECT "Official Name" FROM table_78569 WHERE "Area km 2" = '750.51'
SELECT "Official Name" FROM "table_78569" WHERE "Area km 2" = '750.51'