CREATE TABLE table_15782 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Game site" TEXT, "Record" TEXT, "Attendance" TEXT)

Where was the game held when the attendance was 56,770?
SELECT "Game site" FROM table_15782 WHERE "Attendance" = '56,770'
SELECT "Game site" FROM "table_15782" WHERE "Attendance" = '56,770'