CREATE TABLE table_76450 ("Res." TEXT, "Record" TEXT, "Opponent" TEXT, "Method" TEXT, "Event" TEXT, "Round" FLOAT, "Time" TEXT, "Location" TEXT)

What was the round that Sergio Vinagre had a time of 5:00?
SELECT MAX("Round") FROM table_76450 WHERE "Time" = '5:00' AND "Opponent" = 'sergio vinagre'
SELECT MAX("Round") FROM "table_76450" WHERE "Opponent" = 'sergio vinagre' AND "Time" = '5:00'