CREATE TABLE table_37636 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Record" TEXT, "Game Site" TEXT, "Attendance" TEXT)

Attendance of 55,340 had what opponent?
SELECT "Opponent" FROM table_37636 WHERE "Attendance" = '55,340'
SELECT "Opponent" FROM "table_37636" WHERE "Attendance" = '55,340'