A 45-year-old otherwise healthy man presents with 3 days of fever, cough and pleuritic chest pain. He is a non-smoker, saturating 96% on room air, respiratory rate 18 breaths/min and blood pressure 128/76 mmHg. Chest auscultation reveals right lower zone crackles. CURB-65 score is 0. According to Australian antibiotic guidelines, what is the most appropriate empirical oral antibiotic regimen in the community?